#include<stdio.h>
#include<string.h>
#include<stdlib.h>

int main()
{
    char *ptr = "hello world";

    char src[100] = "hello world";

    char *str = (char*)malloc(sizeof(char) * 100);
    strcpy(str,"hello world");

    printf("hello world = %p\n","hello world");
    printf("ptr = %p\n",ptr);
    printf("src = %p\n",src);
    printf("str = %p\n",str);
    return 0; 
}